Many plants have been grown in space — including sunflowers in 2012, but the Veggie program at the International Space Station aims to learn about how to grow a complicated plant and overcome the hurdles on the way. In 2015, the space station crew grew romaine lettuce...

Roses are sold by length, in centimeters – there isn’t a floral industry-wide standard for the length of the ‘medium stem’ or ‘long stem’ roses but click to see our approximate length guide. Plus, our infographic explains how growers cultivate long-stem roses.